what time?
im sorry, but this was a sprite flash with no story, tweens, and bad effects. you want to do something that REALLY takes time? frame-by-fram original animation. and if you're going to do a sprite flash, do it right. the mario sprite pics you used weren't even from the same game, and the other sprites and bgs you used didnt go well with the others. the blood was bad, the gun clashed with the other gfx horribly. i dont believe it took as much time as you said. its a sprite flash. if you're just beginning, then think "does my movie have a story? does the animation look like a took time on it? would the people of NG like this?". please, practice more. with effort, i think you could do much better. just get on the BBS and ask people things. good day.